"... marriage, besides being a decision, was also a Commitment. However, as life unfolds and people change, should one held steadfast to one's Commitment, at the expense of one's dreams and passion?..."

well, if marriage is about commitment, then the first starting point is to commit to grow together through time and to complement each other as each pursue his/ her dreams. Commitment is hollow and nothing but a piece of paper called the marriage certificate if there is no commitment to help one another grow through time...